Sopro Rapidur® B5 Rapid Drying Floor Screed Binder

Special polymer-modified binder for particularly economical production of highstrength, rapid-set cement screeds to DIN 18 560, allowing early flooring installation. Achieves grade CT-C45-F7 after 28 days 1). Low-chromate to Regulation (EC) No 1907/2 06, Annex XVII.

Also part of the Sopro SMART® – Lightweight Flooring Renovation System

Features and benefits:

■New, enhanced quality

■Ready for tiling after approx. 3 days

■ Long working life: approx. 2 – 3 hours

■May be applied in mixing ratios 1 : 4 and 1 : 5

■High resistance to moisture migration from substrate

■ Suitable for renovation and refurbishment schemes

■ Suitable for floor heating systems

■ Pumpable

■ EMICODE system of GEV (German Association for Control of Emissions in Products for Flooring Installation): EC1PLUS ("very-low-emission-plus") rating

■ For indoor and outdoor use

Mixing ratio:

Mixing ratio 1 : 4 = 25 kg Sopro Rapidur® B5 : 100 kg 0 – 8 mm screed sand to DIN EN 12 620 (15 shovelfuls) : 7.5 – 8.5 ltr water (depending on sand moisture and mortar consistency). w/c ratio 0.30 – 0.34.

Mixing ratio 1 : 5 = 25 kg Sopro Rapidur® B5 : 125 kg 0 – 8 mm screed sand to DIN EN 12 620 (20 shovelfuls) : 9.0 – 10.0 ltr water (depending on sand moisture and mortar consistency). w/c ratio 0.36 – 0.40.

Particle distribution (grading curve) for aggregate (screed sand) shall fall within A8/B8 range under DIN 1045 Part 2, Annex L, Diagram L.1, and shall exhibit an adequate, though not overly high proportion of fine sand; percentage passing a 0.25 mm sieve: approx. 7 – 10 %.

Coverage:

• Mixing ratio 1:4: Approximately 4.0 kg/m² per cm thickness.
• Mixing ratio 1:5: Approximately 3.5 kg/m² per cm thickness.

Strength class:

- Mixing ratio 1:4:

• CT-C20-F4 after one day.
• CT-C35-F5 after three days.
• CT-C45-F5 after five days.
• CT-C60-F7 after 28 days.

- Mixing ratio 1:5:

• CT-C16-F3 after one day.
• CT-C25-F4 after three days.
• CT-C30-F4 after five days.
• CT-C45-F7 after 28 days.